Type-writing machine.



.N. H. ANDERSON. "TYPE WRITING MACHINE.

1 APPLICATION FILED APR. 22. 1910.

Patented Nov. 30

WITNESSES:

' \Vriting hlaclunes, of which UNITED STATES PATENT orries.

NILS H. ANDERSON,

CONNECTICUT.

or MIDDLET WN, CONNECTICUT. Ari-SEIKO TYPEWRITER COMPANY, OF MIDDLETOWN,CONNECTICUT. A CORPORATION TO THE NOISELESS or TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Nov. 30, 1915.

Application filed April 22, 1910. Serial No. 556,964.

To all whom it may concern Be it known that I, Nins H. ANonnsoN, acitizen of the United States. residing at Middletown. in the county of.Middlesex andstate of Connecticut, have invented certain new and usefulImprovements in Typethe following is a full, clear. and exactdescription, such as will enable other skilled in th art it appertainsto make and use the same.

The present invention relates th line-spacing mechanism for ,typewritingmachines, and has torits ob ect to provide a device of that characterwhich shall em brace a small number of parts, be cheap an easy to makeand assemble.

A special object of the invention is to make the-operation as noiselessas possible and to provide improved mechanism for spacingthe platenroller different numbers of lines, as desired.

In the accompanying drawing, wherein is shown one of various possibleembodiments of my invention, Figure l a trout elevation of a part of a'typewriting machine with one form of the invention applie d thereto;Fig. 2 is an end elevation of the same; Fig. 3 is a smaller detail viewshowing the platen roller immediatelyafter the same has been line spacedand betore the line space lever has been released; Figs. at, 5 and 6 aredetail sectional views of c itierent parts of the mechanism taken on thelines m-ae,' yg and respectively of Fig. 1; Fig. 7 is a detail view ofthe platen release lever.

Similar reference characters refer to similar parts throughout thediiiercnt views of the drawing.

lVhile this invention is illustrated and will be hereinafter describedwith reference. to that form of typewriting machine known as thenoiseless ty ewriter, it is to be understoodthat it may beapplied toother torms 0t typewriting machines.

Referring to these drawings in detail, 1 represents an end plate of thecarriage frame carrying a. paper carrier in the form of a platen rollerprovided with a flat steel platen 3 rigidly secured to and extendingbetween the end plates 1 of the frame against which the types (notshown) cO-act. This platen roller 2 is provided with an axle 4:extending to one side thereof for carrying the usual hand roller 5."Mounted on this axle a, preferably outside of the to which in Fig. 4.practical roller the actuator 10 wilLbe .guided and limi carriage frame.is a vided with peripl'ieral and crown teeth 7 and 8 engagedrespectively by a. platen detent 9 and a line spacing actuator 10, theformer of which will be herein described more in detail. This actuator10 is in this embodiment a pawl pivotally mounted upon a line spacinglever 11, which in turn is pivotally mounted on the frame. The pivotalconnection between the actuator 10 and the line spacing lever 11 isshown in detail. A stud 12 provided with a head 13 enters the linespacing provided with an enlarged portion 14 about which the actuator 10turns. Intermediate the side of the actuator and the head of the screwis a resilient cup shaped washer 15 holding the actuator intrictional'engagement with the line spacing lever, whereby as the lever11 is moved toward the platen carried immediately into contact with thecrown teeth 8 ,on the ratchet wheel to rotate the same in a line spacingdirection. line spacing lever is released to permit its return to normalposition, the actuator, 'hich is in frictional engageu'ient therewith,is in'm'iediately carried out of contact with the ratchet teeth in orderto avoid a disagreeable and noisy clicking of the pawl writing machines.

'lhe actuator and line spacing lever are ted in their returnmoreposition by a. stationary L- shaped cam arm 16 rigidly secured tothe frame and extending to one side of and parallel to the plane ofmovement of the actuator, and which is engaged by a pin 17 carried bythe actuator. Fhis arm not only limits the return movement of the linespacing lever, but also returns. the actuator along a line parallel withthe plane of the ratchet teeth and holds the same closely adjacentbutout of contact with the ratchet wheel so that it. may in'imediatelyengage therewith when the device is actuated.

Pivotal connection between the line spacing lever and the frame oft-hemachine is shown. in a detail sectional View in Fig. 6 A stud enters theframe at 18 and is provided with a central enlarged portion 19' and aslotted head 20. About the enlarged portion of this pin is a bushing 21with an outer flanged end; about the bushing is ment to normal ratchetwheel 6 prolever 11 and is ratchet mounted the line spacing lever 11having an lever to normal position after it is actuated.

This construction permits a ready adjustment of the spring in thefollowlng manner: A screw driver is inserted in the slotted head. 20 andturned to loosen the threadedconnection between the pin and theframe,after which the bushing 21 may be turned by means of a wrench engagingthe hexagonal head, thereby increasing or diminishing the tension of thespring 22. As soon as the desired tension is obtained the screw head istightened, firmly clamping the bushing in adjusted position between theframe and the head. The bearing sleeve of the line spacing lever ispreferably constructed slightly shorter than the sleeve of the bushing21 in order to have a free rotary motion thereabout when the sleeve isclamped in position.

The actuator 10 carried by the line spac= ing lever is provided at oneside with a curved cam face or edge 23 adapted to be engaged by one arm'24 of a rotary stop 25 in the form of a bell crank lever. The oppositearm 26 carries a pin 27 engaging one of a plurality of recesses or holes28 in the line spacing lever; (see Figs. 1 and 5). This stop turns abouta stud 29 rigidly secured to the line spacing lever and having anenlarged head 30. Carried by the stop 25 is a sleeve 31 of sufficientsize to receive the enlarged, head 30 of the stud, thereby forming anannular chamber about the shank of the stud in which is a spring 32 bearing against the stop at one end and the inner surface of the head at itsopposite end, tending to hold the stop with the pin 27 engaging one ofthe recesses 28' in normal position. The outer surface of the sleeve 31is preferably knurled or roughened in order that the same can beconveniently grasped by the operator and moved in the direction of thelongitudinal aXis of the stud 29, whereby the pin 27 may be withdrawnfrom the hole 28 and moved into engagement with another to vary thethrow of the actuator.

In the position shown in Fig. 1 the actuator will engage the ratchetwheel and rotate the platen roller three spaces in a line spacingdirection before the projection 24 engages the cam surface 23, therebypreventing further motion, as shown clearly in Fig. 3. By rotating thestop to the intermediate position the projection 24 of the, adjustingstop willengage the central portion of the cam'face or edge 23 andpermit the actuator vto move only a sufieient dislseaaai tance to rotatethe platen roller two line spaces before the wedging action takes place,while if the adjusting stop is moved to the third position theprojection will engage the upper, end of the cam surface and wedge theactuator into engagement with the ratchet wheel after the platen rollerhas been rotated through a single line space.

In order to insure the rotation of the platen roller through exact linespaces, a spring arm 33 is rigidly secured to the frame of the machineat 34 and carries at the up per part thereof the roller 9 engaging theperipheral notches T of the ratchet wheel in order to register the papercorrectly at each operation. Should itbe desired, however, to rotate theplaten an irregular amount, as is frequently necessary in filling inblank forms, for example, the roller 9 may be thrown out of engagementwith the ratchet wheel by raising an arm 35, Fig. 7, of the plate 36,shown in detail in Fig. 7 mounted on a sleeve about the axis oftheplaten roller and provided with two notches 37 and 38. The notch 37is of such shape and size that when the roller 9 engages the ratchet 7,said roller and its supporting parts 38 are entirely free from andwoutof contact with the plate 36, the latter being yieldingly supported inthis position by a spring detent 39 secured between the frame ,of thecarriage and the spring arm 33, said detent being providedat its upperend with a notch engaging a projection 40 in the plate 36, and with adeflecting or cam surface 41 to provide for the passage of theprojection 40 into the notch. The detent 39 thus provides a down stopfor the plate or release lever, supportin the same out of contact witheither the; die r, 9 .or its bearings 38, and at the r tine holding therelease lever lightly falid finnily in position, preventing the samefrom "rattling. Furthermore, the release lever being out of contact witheither the roller 9 or its frame, free action in controlling themovement of the platen through the roll 5 is permitted.

' It will be noted in operation that when the line spacing lever 11 isactuated the actuator .or pawl carried thereby will be moved intoimmediate engagement with the ratchet teeth and rotate the same a vary-'ing number of spaces, according to the posi-' tion of the adjustingmechanism, before the extension or projection 24 wedges the actuatorthrough the cam surface. 23 against the ratchet teeth, therebypreventing further movement. .When the line spacing le- -ver is releasedthe-spring 22about'the pivotal connection with the frame willimmediately carithe same to normal position, and

the frictional contact between the actuator 30 I writingmachines}:i'ncombination,;a papercarr ers a". ratchet -thereon, f a .jp votally theactuator and the free e frame of the machine will not only guide andlimit the movement of the movable the scope thereof, it is. intendedthat all matter contained in the above description or v shown in theaccompanying drawings shallbe interpreted as illustrative and not in alimiting sense; v

Having described my mvent on, what I claim as new and desire to tersPatent is: v

1. In a line spacing'mechanismfor typewriting machines, in combination,a paper carrier, a ratchet*thereon, a" line. spacing secure by Letlever, an actuator pivotally mounted on said line spacing" leverintermediate the ends thereof adapted lto; be" carried into engagementwith said ratchet when the line-spacing lever is actuated, and"stationary means j adapted to engage said actuator. and hold saidactuator adjacentand out of contact .with said ratchet and to limit.the. return,

movement ofs'ai-dleverJby its engagement. f, p

'- "WI'ItIIIg machines ln combmation, a platen with the pawl.

2. In a linespacingmechanismfor ty'pe f -.yer, anf actuator pivotallymounted on said l ne spacing lever, spring means for holdmounted linespacing lever, spring 1 mean about the pivot of sa'id lever adaptedto 7hold sa'idlever in; ,Iiormal position, ;,actu.- atorm'oi'i'ntcd"intmediatejthe ends' lever held adjacenttoliut out-of ontactwith said Tat'che t, landniean'sl int.

forvaryingthe thro vgof I I 3. In a"l1 ne spacing-mechanism fo writingmachinestin cornb'i-natiomza paper. carrier, a-ratchettherefor, a,li'nejspa'cingi lever, spring means adapted [to ,holdfsaid lever-innormal osition; an 'actl ator havingl a" curved edgemounted"intermediate the" endslof said lever held adjacent tobut out:

ratchet, and means on of contactgivith,sai

said line "sp'acin cver'. adapted to" engage different portions'of' saidedge .to' vary the- .throw of said actuator wl 1en theline-spac- .inglever is actuated. n V 4'. In line spacing mechanism for typewritingmachines, in combination, a paper carrier, a] ratchet therefor,- a.'line spacing lever, an actuator having a camface mounted on said .lme.spacinglever, means for holding saidactuatorin frictional engagementtherewlth whereby said line spaclng'v lever. and actuator movetogether,". and means carried by said lever adapted .to entuator.

carrier, a ratchet there-for, a line spacing lever having holes therein,an actuator mounted on said line spacing lever, means for holding saidactuator in frictional engagement therewith, a pivotally mounted stopadapted to engage one of said holes to 'vary the throw of said actuator,and a means for holding said actuator adjacent to but out of contactwith said ratchet.

7. In line Spacing mechanism for type- Writing machines, in combination,a platen.

.roller a ratchet therefor, a line spacing lever,an actuator pivotallymounted on said .llne spac1ng lever,.spr1ng means for holding saidactuator 1n operative fr1ctional engagement vvith said line spac nglever, and

a stationary arm to limit the return movement of said .line spacinglever;

8. In line spacing mechanism for typeroller, airatchet' therefor,linespacing le-.

ng'said actuator in. operative frictional engagement With said linespacing lever, and means adapted-to hold said hne'spacmg lever in normalposition through said ac- 5 9. "In spacingamechanism for type ,"Writi ngmachines, in combination, apaper 1 carr 1e1', a] ratchet therefor, apivotally 'n ounted line spacing lever, spring means about said pivotfor holding said line spacmg lever in normal POSllZlOIl, an actuator"pivotally' mounted on said line spacinglever, means forg'determiningthe throw of said actuator, and means for holding said actufator in]frictional contact with said line spacing-lever whereby it is Withdrawnfrom engagement with said ratchet on" return movement of said linespacingi lever.

10.111 line spacing-mechanism .for typewriting machines, in combination,a carriage frame, a paper'carrienI-a ratchet therefor, a line spacinglever pivotally mounted on said frame, a-{spring' for returning said.lme

spacing lever, means for varying the ten-= si'on'of the spring, anactuator mounted on sand hnespacmg lever, means for holdlng gagedifferent po1 :.tions of saidactuator to.

vary the throw of. said'actuator.

5. .In' line spacing .mecl'ianism for type-. ,Writm'g machines, incombinat on, a paper said actuator in frictional engagement. therewith,and a stop engaging said, actuator adapted to varyflthezthrow ofsaidactuator. '11. In :line' sp'acingmechanism for typewritingmach'ines,in combination, aplaten -1- 1'1e.1- a.fratchet therefor, a line spacingmeans for "holding; v said line spacing lever in normal position, anactuator mounted on said llnespacing lever, and

spring means associated with the connection drawn from engagement withsaid ratchet when the line spacing lever returns to normal position.

12.- In line spacing mechanism for typewriting machines, in combinatiomacarriage frame, a platen roller carried thereby, a ratchet wheel on'saidroller, a line spacing lever pivotally. supported on said frame, a pivotfor said lever, a spring about said pivot, an actuator pivotally mountedon said line spacing lever adapted to be carried into engagement withsaid ratchet wheel when the line spacing lever is actuated, a resilientmember adapted to act on said actuator and lever, whereby saidactuatoris withdrawn from said ratchet wheel when said lever is released, andmeans for line-centering said platen roller.

13. In line spacing mechanism for typewriting machines, in combination,a frame, a paper carrier, a ratchet therefor, a line spacing levermounted on said frame, spring means adapted to hold said lever in normalposition,

an actuator having a curved edge pivotally mounted intermediate the endsof said lever, a pivotally mounted stop adapted to engage differentportions of said actuator on said line spacing lever to vary the throwof said actuator when the line spacing lever is actuated, and means forline-centering said paper carrier.

14. In line spacing mechanism for typewritingmachines, in combination, acarriage carried into engagement with said .ratchet line spacing leveris actuated, a resilient arm-on, said frame, and a roller carriedthereby adapted to register said platen roller.

15. In line spacing mechanism for typewriting machines, in combination,a frame, a platen roller, a ratchet wheel on said roller, a, linespacing lever pivotally mounted onsaid frame, spring means adapted tohold said lever in normal position, an actuator having a camintermediate the ends of said lever, a pivotally mounted stop havingapart adapted to engage the cam face in said actuator to vary the pointof throw of said actuator when the line spacing lever is actuated, aresilient arm on said frame, and means'carried thereby adapted toline-center said platen roller.

16. In line spacing mechanism for typewriting machines, in combination,a support, an adjustable sleeve secured thereto, a line spacing leverturning on said sleeve, and a return spring coacting with said sleeveand said line spacing lever In testimony whereof I aflix my signature,in the presence of two witnesses.

NILS H. ANDERSON.

Witnesses J. L. ATHERTON, EDWARD H. CLARK.

face pivotally mounted ,wheel or withdrawn therefrom when the

